Further reading:

She Comes First:
The Thinking Man's Guide to Pleasuring a WomanIan Kerner
79 Reviews

HarperCollins, May 25, 2004 - 240 pages
As women everywhere will attest, when it comes to understanding female sexuality, most guys know more about what's under the hood of a car than under the hood of a clitoris. And while it seems that men have struggled valiantly since the dawn of time to find ways to reliably elicit the female orgasm, rare is the guy who has the modesty to ask: "What do I do?" Ironically, the answer has always been right there on the tip of his tongue.

A large penis bumping the cervix feels just like getting kicked in the nuts, as per the woman who kicked me in the nuts the first time I did that by mistake.